
LM filetr [1]}: Conventional maximum likelihood estimation.

Shin et al. [2]}: The maximum likelihood estimation with a total variance regularization term.

Rapp et al. [3]}: The maximum likelihood estimation combined with a total variance regularization term, a cluster searching algorithm and a superpixel formation strategy.

U-Net w/o I[4]}: The deep learning model based on U-Net [5]} without the intensity fusion strategy.

U-Net w/ I[4]}: The deep learning model based on U-Net [5]} with the intensity fusion strategy.

Non-local [8]}: The deep learning model based on non-local blocks [9]} and deep boosting backbones [10]}.

U-Net++ [11]}: The deep learning model based on U-Net++ [12]}.

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